Excessive Grain

Discussion in 'Digital Discussion & Q&A' started by jereece, Dec 3, 2007.

  1. jereece

    jereece TPF Noob!

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    I have a problem with excessive grain in my digital photos when I use a flash. Here's a link to an example of the grain I am seeing.

    I have an Olympus SP-510UZ. Outdoor shots look great but indoor shots with a flash or without are terrible. I can understand indoor shots being grainy without a flash because the camera increases the ISO pretty high. However, the example photo I posted was shot at ISO 400 which should have a pretty good grain. Below is the EXIF info for this shot. Is is simpl a matter of using a lower ISO indoors? When I used 35mm film I got pretty good results at ISO 400. Any suggestions is helpful?

    EXIF Information
    ImageDescription : OLYMPUS DIGITAL CAMERA
    Make : OLYMPUS IMAGING CORP.
    Model : SP510UZ
    XResolution : 72/1
    YResolution : 72/1
    ResolutionUnit : Inch
    Software : Version 1.0
    DateTime : 2007:11:22 18:45:57
    YCbCrPositioning : co-sited
    ExifInfoOffset : 1084
    CustomRendered : Normal process
    ExposureMode : Auto
    WhiteBalance : Auto
    DigitalZoomRatio : 0/100
    SceneCaptureType : Standard
    GainControl : High gain up
    Contrast : Normal
    Saturation : Normal
    Sharpness : Normal
    PrintIM IFD : 690Bytes
    Print Image Matching Info
    Version : 0300
    Unknown (0001) : 14 00 14 00
    Unknown (0002) : 01 00 00 00
    Unknown (0003) : EE 00 00 00
    Unknown (0007) : 00 00 00 00
    Unknown (0008) : 00 00 00 00
    Contrast : 0 (-128`127)
    Brightness : 0 (-128`127)
    ColorBalance : 36 01 00 00
    Saturation : 00 00 00 00
    Sharpness : 00 00 00 00
    Unknown (000E) : 4E 01 00 00
    Unknown (0010) : 5E 01 00 00
    Unknown (0020) : 52 02 00 00
    Unknown (0100) : 03 00 00 00
    Unknown (0101) : FF 00 00 00
    Unknown (0102) : 83 00 00 00
    Unknown (0103) : 83 00 00 00
    Unknown (0104) : 83 00 00 00
    Unknown (0105) : 83 00 00 00
    Unknown (0106) : 83 00 00 00
    Unknown (0107) : 80 80 80 00
    Sub Information
    ExposureTime : 1/200Sec
    FNumber : F3.3
    ExposureProgram : Program Normal
    ISOSpeedRatings : 400
    ExifVersion : 0221
    DateTimeOriginal : 2007:11:22 18:45:57
    DateTimeDigitized : 2007:11:22 18:45:57
    ComponentConfiguration : YCbCr
    CompressedBitsPerPixel : 2/1 (bit/pixel)
    ExposureBiasValue : EV0.0
    MaxApertureValue : F2.8
    MeteringMode : Division
    LightSource : Unidentified
    Flash : Fired(Auto)
    FocalLength : 14.20(mm)
    MakerNote : Olympus Format : 2008Bytes (Offset:1466)
    UserComment :
    FlashPixVersion : 0100
    ColorSpace : sRGB
    ExifImageWidth : 2304
    ExifImageHeight : 3072
    FileSource : DSC
    SceneType : A directly photographed image
    Compression : OLDJPEG
    XResolution : 72/1
    YResolution : 72/1
    ResolutionUnit : Inch
    JPEGInterchangeFormat : 3682
    JPEGInterchangeFormatLength : 4764
     
  2. Alex_B

    Alex_B No longer a newbie, moving up!

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    is your example shot a crop?


    anyway, ISO 400 is not really low ISO and some cameras show quite pronounced colour noise at ISO 400. Is there any way to lower the ISO manually?
     
  3. Alex_B

    Alex_B No longer a newbie, moving up!

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    welcome to the forum anyway ;)
     
  4. Digital Matt

    Digital Matt alter ego: Analog Matt

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    Unfortunately p&s digitals do not handle noise very well, and certainly cannot be compared to 35mm film. Manually set the ISO to it's lowest.
     
  5. SpeedTrap

    SpeedTrap TPF Noob!

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    In my dealings with Olympus they are all show alot of noise compaired to others, if you are using a flash anyway, just go to your lowest ISO and it should fix the problem
     
  6. jereece

    jereece TPF Noob!

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    Thanks for the quick replies. Yes the example is a cropped shot. I can manually lower the ISO to 200, 100 or 50. So I will give that a try next time. I guess I used 400 just because that's what I used to use most often when shotting 35mm and got good results. Well I am learning.

    Thanks again for the help.

    Jim
     
  7. Cero21

    Cero21 TPF Noob!

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    Bear in mind too that the crop is much much bigger than I imagine you had 35mm shots printed.
     
  8. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    Welcome to the forum.

    All good points so far....
    ISO 400 is a fairly high ISO for a 'digi cam'...although the high end digi-cams are getting better. A digital SLR camera will produce much, much cleaner images at ISO 400...and probably ISO 800 and even 1600.

    One problem with digital is that we can very easily zoom in and have a close look...which emphasizes the problems or faults. Try printing your image at a reasonable size (maybe up to 8x10) and hold it at viewing distance (not up to your nose)...then see if the grain (digital noise) is a problem.
     
  9. _SnapShot_

    _SnapShot_ TPF Noob!

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    That looks like an underexposed photo that was adjusted and cropped. You are right, it's ugly. I've had the same happen so don't feel alone. It almost looks like there is no flash and you used natural light.

    What this "GainControl : High gain up"

    The white bowl, the pots and pans and foil should have been lit up by the flash, and they hardly show anything. Could it be you were more then 15 or 20 feet away.
     

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